Automatic Sample Injection Device Gripper Positioning
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Solution Overview
Problem
Users face difficulties in accurately positioning the gripper in automatic sample injection devices due to challenges in confirming the positional relation between the vial and the gripper during the teaching process.
Innovation Solution
An automatic sample injection device with a target position setting unit that executes an auxiliary operation to visually assist the user in positioning the gripper, including adjusting the gripper's opening degree to match the vial's outer diameter and providing a light source or visible protrusion to facilitate alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the user performs positioning of the gripper visually without assistance, then the device structure remains simple, but the positioning accuracy and ease of operation deteriorate
Solution Approach 1:
A marker is introduced as an intermediary visual element between the gripper and the vial. The marker is disposed at a predetermined position on the gripper and serves as a visual reference point that helps the user accurately position the gripper relative to the vial during teaching mode, without adding complex mechanical assistance
Solution Approach 2:
The marker provides visual contrast and visibility against the background, enabling the user to easily detect and align the gripper with the vial. The marker's visual properties (color, shape, or reflection characteristics) are designed to stand out, facilitating accurate positioning through visual confirmation
2Manufacturing precision
If the gripper opening degree is adjusted to match the vial outer diameter, then the positioning accuracy improves, but the device complexity increases
Solution Approach 1:
The gripper opening degree is pre-adjusted to match the outer diameter of the vial during the teaching mode setup. This preliminary configuration establishes the correct gripper-vial fit before actual operation, ensuring positioning accuracy without requiring complex real-time adjustment mechanisms
Solution Approach 2:
The opening degree parameter of the gripper is optimized to correspond to the vial's outer diameter. By adjusting this geometric parameter, the system achieves precise fit and positioning, leveraging simple parameter optimization rather than complex control systems
Data Source
AI summary
An automatic sample injection device is provided with a vial placement unit (2) configured to place a vial (10) thereon, a sampler (6) provided at a position different from a position of the vial placement unit (2), the sampler being configured to collect a liquid from the vial (10), a conveyance unit (4) provided with a gripper (14) for gripping the vial (10) from above, the conveyance unit being configured to convey the vial (10) between the vial placement unit (2) and the sampler (6), a target position setting unit (22) configured to execute a teaching mode for setting a target position at which the gripper (14) is to be placed when placing the vial (10) at a predetermined position, cause a user to perform positioning of the gripper (14) to a position to be the target position in the teaching mode, and set a position of the gripper (14) positioned by the user as the target position, and a control unit (20) configured to position the gripper (14) at the target position set by the target position setting unit (22) when placing the vial (10) at the predetermined position. The target position setting unit (22) is configured to execute, in the teaching mode, an auxiliary operation for visually assisting positioning of the gripper by the user when causing the user to perform positioning of the gripper (14) to a position to be the target position.